<?php

/**
 * @file
 * Contains opencase.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Access\AccessResult;
use Drupal\opencase\EntityTypeRelationsWidget;


/**
 * Implements hook_block_access
 *
 * Forbids the opencase_contextual_menu block on pages where it has no content.
 * (Without this, it was displaying an empty sidebar)
 */
function opencase_block_access(\Drupal\block\Entity\Block $block, $operation, \Drupal\Core\Session\AccountInterface $account) {
  if ($operation == 'view' && $block->getPluginId() == 'opencase_contextual_menu') {
    $route_name = \Drupal::routeMatch()->getRouteName();
    $routes_where_it_should_be_shown = [
      'entity.oc_actor.canonical',
      'entity.oc_actor.edit_form',
      'view.cases.page_1',
      'entity.oc_case.canonical',
      'entity.oc_case.edit_form',
      'entity.oc_case.add_form',
      'view.activities.page_1',
      'entity.oc_activity.canonical',
      'entity.oc_activity.edit_form',
      'entity.oc_activity.add_form',
      'system.menu.opencase-add-actors',
      'block.block.opencaseaddactors',
    ];
    return AccessResult::forbiddenIf(!in_array($route_name, $routes_where_it_should_be_shown))->addCacheableDependency($block);
  }

  // No opinion.
  return AccessResult::neutral();
}


/**
 * Implements hook_page_attachments
 *
 * Add the opencase library to every page
 */
function opencase_page_attachments(array &$page) {
  $page['#attached']['library'][] = 'opencase/opencase-lib';
}


/**
 * Implements hook_link_alter
 *
 * Makes menu items that are external links open in new tab.
 */
function opencase_link_alter(&$variables) {
  if ($variables['url']->isExternal()) {
    $variables['options']['attributes'] = ['target' => '_blank'];
  }
}

/**
 * Implements hook_preprocess_page_title
 *  
 * Modify the page title to include more information 
 */
function opencase_preprocess_page_title(&$variables) {
  
   $route_name = \Drupal::routeMatch()->getRouteName();
    switch ($route_name) {
      case 'entity.oc_case.canonical':
        $case = \Drupal::routeMatch()->getParameter('oc_case');
        $variables['title'] = $case->getName() . ": Case Details and Files";
        break;
      case 'view.cases.page_1':
        $actor_id = \Drupal::routeMatch()->getParameter('actor_id');
        $actor = \Drupal::entityTypeManager()->getStorage('oc_actor')->load($actor_id); 
        $variables['title'] = $actor->getName() . ": Cases";
        break;
      case 'view.activities.page_1':
        $case_id = \Drupal::routeMatch()->getParameter('case_id');
        $case = \Drupal::entityTypeManager()->getStorage('oc_case')->load($case_id); 
        $variables['title'] = $case->getName() . ": Activities";
        break;
    }
}

/**
 * Implements hook_help().
 */
function opencase_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the opencase module.
    case 'help.page.opencase':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Simple Case Management') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_theme().
 */
function opencase_theme() {
  return [
    'opencase' => [
      'render element' => 'children',
    ],
  ];
}

/**
 * Implements hook_form_ID_alter
 */
function opencase_form_oc_case_type_add_form_alter(&$form, $form_state) {
  $widget = new EntityTypeRelationsWidget();
  $widget->setup($form);
}


/**
 * Implements hook_form_ID_alter
 */
function opencase_form_oc_case_type_edit_form_alter(&$form, $form_state) {
  $widget = new EntityTypeRelationsWidget();
  $widget->setup($form);
  $widget->populate($form);
}

/**
 * Implements hook_uninstall().
 * Removes configs.
 */
function opencase_uninstall() {
  $configs = [
    'block.block.opencasecontextualmenu',
    'block.block.opencase',
    'block.block.opencaseaddactors',
    'system.menu.opencase-add-actors',
    'system.menu.openc',
    'views.view.cases',
    'block.block.opencaseglobal',
    'system.menu.opencase-admin',
    'views.view.activities'
  ];
  foreach($configs as $config) {
    Drupal::configFactory()->getEditable($config)->delete();
  }
} 

function opencase_views_pre_render($view) {
  if (empty($view->result) && empty($view->exposed_input)) {
    $view->exposed_widgets = NULL;
  }
}


function opencase_entity_field_access($operation, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $account, $items = NULL) {
  if ($field_definition->getName() == 'field_linked_opencase_actor'
      && $operation == 'edit'
      && !$account->hasPermission('administer users')) {
    return AccessResult::forbidden();
  }
  return AccessResult::neutral();
}


/**
 * Implementation of hook_form_alter()
 * After deleting an actor or a case, redirect to the main page, which is a view of all cases. 
 */
function opencase_form_alter(&$form, &$form_state, $form_id) {
  if (preg_match('/oc_actor_.*_delete_form/', $form_id) or (preg_match('/oc_case_.*_delete_form/', $form_id))) {
    $form['actions']['submit']['#submit'][] = '_opencase_delete_case_redirect';
    $form['actions']['cancel']['#url'] = $form_state->getFormObject()->getEntity()->toUrl();
  }
  if (preg_match('/oc_activity_.*_delete_form/', $form_id)) {
    $form['actions']['submit']['#submit'][] = '_opencase_delete_activity_redirect';
    $form['actions']['cancel']['#url'] = $form_state->getFormObject()->getEntity()->toUrl();
  }
}

function _opencase_delete_case_redirect($form, &$form_state) {
  $form_state->setRedirect('view.cases.page_2'); // redirect to view of all cases
}
function _opencase_delete_activity_redirect($form, &$form_state) {
  $case_id = $form_state->getFormObject()->getEntity()->oc_case->target_id;
  $form_state->setRedirect('view.activities.page_1', ['case_id' => $case_id]); // redirect to the activity list
}
function _opencase_cancel_delete_activity_redirect($form, &$form_state) {
  $entity = $form_state->getFormObject()->getEntity();
  $form_state->setRedirect('entity.oc_activity.canonical', ['oc_activity' => $entity->id()]); // redirect to the activity
}